Removable cover sheet roll for a contact printer

Details Removable cover sheet roll for a contact printer Removable cover sheet roll for a contact printer

1989-11-17

1990-08-28

Wintercorn, Richard A.

Photocopying

Contact printing

With scanning

355 91, 355 94, G03B 2710, G03B 2720

Patent

active

049529730

ABSTRACT:
An improvement in a contact printer which comprises means for supporting a film and an original in superposed relationship on a vacuum table, means for providing a source of light for exposing the film through the original, and means for moving the light over the surface of the superposed film and original. A substantially impervious, flexible and transport cover sheet carried by the light moving means is arranged to cover the superposed film and original as the exposing light is scanned across the film and original whereby the vacuum is applied to the film and the original to remove air from therebetween as the film is exposed by the light through the cover sheet and the original. The improvement comprises means for removing and replacing the cover sheet to assure that the optical path for the exposing light remains clear and unobstructed.

REFERENCES:
patent: 2760419 (1956-08-01), Gelb
patent: 3560090 (1971-02-01), Jones
patent: 3584955 (1971-06-01), Stievenart et al.
patent: 3851969 (1974-12-01), Haus
patent: 4029404 (1977-06-01), Mizukami et al.
patent: 4316669 (1982-02-01), Tachiki
patent: 4437759 (1984-03-01), Mizukami et al.
patent: 4466737 (1984-08-01), Hastings
patent: 4526463 (1985-07-01), Hickey et al.
patent: 4707125 (1987-11-01), Ohlig et al.

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